ADUC7121BBCZ-RL

ARM微控制器 - MCU PRECISION ANALOG MCU I.C

Product Details

The ADuC7120/ADuC7121 are fully integrated, 12-bit, 1 MSPS, data acquisition systems incorporating a high performance multichannel ADC, 16-bit/32-bit microcontroller unit MCU, and Flash®/EE memory on a single chip.

The analog-to-digital converter ADC consists of eleven single-ended inputs for the ADuC7120 seven single-ended inputs for the ADuC7121 and two extra differential input pairs. The two differential input pairs can be routed through a programmable gain amplifier PGA. The ADC can operate in single-ended or differential input mode. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.

The ADuC7120/ADuC7121 provide five current output digital-to-analog converters DACs. The current sources five current DACs feature low noise and low drift, high-side current output at an 11-bit resolution. The five current digital-to-analog converters IDACs are as follows: IDAC0 with 250 mA full-scale FS output, IDAC1 with 200 mA FS output, IDAC2 with 45 mA FS output, IDAC3 with 80 mA FS output, and IDAC4 with 20 mA FS output.

The ADuC7120/ADuC7121 also contain up to 12 voltage output DACs. The DAC output range is programmable to one of three voltage ranges.

The devices operate from an on-chip oscillator and a phase-locked loop PLL generating an internal high frequency clock of 41.78 MHz UCLK. This clock is routed through a programmable clock divider from which the MCU core clock operating frequency is generated. The microcontroller core is an ARM7TDMI®, 16-bit/32-bit reduced instruction set computer RISC machine, which offers up to 41 MIPS peak performance. 8 kB of SRAM and 126 kB of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.

On-chip factory firmware supports in circuit serial download via the I2C serial interface port; nonintrusive emulation is also supported via the JTAG interface. These features are incorporated into a low cost QuickStart development system supporting this MicroConverter® family.

The devices operate from 3.0 V to 3.6 V, and they are specified over the −40°C to +105°C industrial temperature range. The IDACs are powered from a separate input power supply, PVDD. When operating at 41.78 MHz, the power dissipation is typically 120 mW. The ADuC7120/ADuC7121 are available in a 108-ball chip-scale package ball grid array [CSP_BGA].

**Applications**

.

Optical modules—tunable laser

### Features and Benefits

.

Analog input/output

.

Multiple channel, 12-bit, 1 MSPS ADC

.

2 differential pairs with input PGA

.

General-purpose inputs differential or single-ended

.

ADuC7121: 7 channels

.

Fully differential and single-ended modes

.

0 V to VREF analog input voltage range single-ended mode

.

5 low noise IDACs

.

250 mA, 200 mA, 45 mA, 80 mA, 20 mA

.

12-bit voltage output DACs

.

ADuC7121: 4 channels

.

4× 12-bit voltage output DACs

.

On-chip voltage reference

.

On-chip temperature sensor

.

Microcontroller

.

ARM7TDMI core, 16-bit/32-bit RISC architecture

.

JTAG port supports code download and debug

.

Clocking options

.

Trimmed on-chip oscillator ±3%

.

External watch crystal

.

External clock source up to 41.78 MHz

.

41.78 MHz PLL with programmable divider

.

Memory

.

126 kB Flash/EE memory, 8 kB SRAM

.

In-circuit download, JTAG-based debug

.

Software triggered in-circuit reprogrammability

.

On-chip peripherals

.

UART, 2 × I2C and SPI serial I/O

.

32-pin GPIO port

.

4× general-purpose timers

.

Wake-up timers and WDT

.

Power supply monitor

.

IDAC monitor

.

Temperature monitor

.

Vectored interrupt controller for FIQ and IRQ

.

8 priority levels for each interrupt type

.

Interrupt on edge or level external pin inputs

.

Power

.

Specified for 3 V operation

.

Normal mode: 11 mA at 5.22 MHz, 30 mA at 41.78 MHz

.

Packages and temperature range

.

7 mm × 7 mm 108-ball CSP_BGA

.

Fully specified for –40°C to +105°C operation

.

Tools

.

Low cost QuickStart development system

.

Full third party support